Don't connect to audio source directly, otherwise the speakers may be damaged. During class A status working, the top panel of amp will be very hot, please don't cover the upper and lower heat dissipation windows. When the amp is turned on, don't short the output, press class A and class AB switch, or plug in and out signal cable. Inspired by Accuphase A35 circuit and E650, adopting 3 pairs of US IRFP240/9240 power transistors in each channel, for larger current which can reach 20A. When working in class A, the sound is more detailed, the high and low frequencies extend well, and the bass control is very good.
In Class AB, speed is faster and the high and low frequencies are cleaner. Specially designed and adding higher playability for audiophiles.Using 30A imported relay, with class A and class AB status switch, providing differnt working styles to choose. High-end and good-quality components are used, such as 16PCS Nikon55620uF filter capacitor in each channel, Italy AV MKP film coupling capacitors, 350W iron-core toroidal transformer, imported capacitors and resistors, 35A bridge rectifiers and 30A relay, 2.5KG heat-sink fin and so on. All-aluminum precision chassis, surrounded by large mesh cooling. With soft start circuit, mains DC blocking circuit, speaker protection circuit, overheat protection circuit (automatic disconnect output when reach 85°). Audio input: balanced XLR, single-ended RCA. Audio output: banana speaker jacks.
Input impedance: 40KO / balanced, 20KO / single ended. Signal to noise ratio: 110dB (when the input is shorted). Power transistor: 3 pairs of US IRFP420/IRFP9240 of each channel. Static power consumption: 120W / Class A, 40W / Class AB.
Class A quiescent current: 2.7A (450mA per transistor). Dimensions(WHD): 224231378mm / 6.726.9311.34in. Net Weight (1PC): 14.3kg / 31.52lb.
Package weight: 30KG / 66.13lb. 1 Pair Power Amplifier (optional).1 Preamp + 1 PairPower Amp (optional). 1 Power Cord for Preamp (optional). 2 Power Cord for Power Amp (optional). Please leave VALID TELEPHONE NUMBER which is necessary and very important. For package less than 2KG, we use. (10-25 days to most countries). And for package over than 2KG we use. (5-8 days to most countries). Free Return Within 30 Days. We provide return within 30 days. Is provided for all items. Audio accessories and consumables such as vacuum tubes. If you are satisfied with our products and service please leave a 5-star.
Feedback, we will provide better solutions until you are satisfied. Douk Audio / Nobsound Studio was founded in 2013 in Shenzhen CHINA, we own several brands including. Douk Audio / Nobsound / Little Bear. As a professional audio company, we are dedicated to design and produce the best products at the lowest prices to make HiFi affordable. We will spare no efforts to bring great products and service for.
Improve our customers' listening experience. During holiday, please allow us to response you early next week.Please don't leave any negative / neutral feedback or make dispute/claim on our non-working time, thank you for your understanding and cooperation. The item "HiFi Stereo Tube Preamp + Split Monoblock Power Amplifier Class A Single-end Amp" is in sale since Tuesday, February 25, 2020. This item is in the category "Consumer Electronics\TV, Video & Home Audio\Home Audio\Receivers & Amplifiers\Amplifiers & Preamps".
The seller is "doukstore" and is located in shenzhen. This item can be shipped worldwide.